<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type" content="multipart/form-data; charset=utf-8"/>
    <title>Title</title>
</head>
<body>
<form method="POST" action="/api/file/upload" enctype="multipart/form-data">
    <input type="text" name="tag">
    <input type="file" name="file">
    <input type="submit" name="确定">
</form>
<form method="POST" action="/api/file/upload" enctype="multipart/form-data">
    <input type="text" name="tag">
    <input type="file" name="file">
    <input type="file" name="file">
    <input type="file" name="file">
    <input type="submit" name="确定">
</form>
</body>
</html>